Thermodynamic study of the interaction between 5,10,15,20-tetrakis-(N-methyl-4-pyridyl)porphyrin tetraiodine and sodium dodecyl sulfate

被引：14
|
作者：
Almeida, C. M. R. [1 ]
Nascimento, B. F. O. [1 ]
Pineiro, M. [1 ]
Valente, A. J. M. [1 ]
机构：
[1] Univ Coimbra, Dept Chem, CQC, P-3004535 Coimbra, Portugal
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2015年 / 480卷
关键词：
Sodium dodecyl sulfate; Porphyrin; Aggregation; Electrical conductance; Fluorescence; MICELLE FORMATION; PORPHYRIN; SURFACTANT; MICELLIZATION; FLUORESCENCE; AGGREGATION; ASSEMBLIES; GROWTH;
D O I：
10.1016/j.colsurfa.2014.12.030
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The interaction between 5,10,15,20-tetrakis-(N-methyl-4-pyridyl) porphyrin tetraiodine (TMePyPI4) and the anionic surfactant sodium dodecyl sulfate (SDS) has been studied in aqueous solutions using electrical conductivity, UV-vis and fluorescence spectrophotometries. The electrical conductivity data suggeststhat the addition of SDS to TMePyPI4 solutions is accompanied by strong interactions (mainly electrostatic) with the formation of aggregates. These aggregates have a stoichiometry somewhat lower than the simple charge neutralization, possible due to the formation of supramolecular structures. At SDS/TMePyPI4 ratios higher than the stoichiometry ratio, those SDS-TMePyPI4 redissolve and at higher SDS concentrations formation of micelles is observed. The effect of both porphyrin surfactant and temperature allows a detailed thermodynamic analysis of the SDS micellization process in this multicomponent system. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：279 / 286
页数：8
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